I have successfully done this on my 690. Send me your email and I'll forward you the designs for a rack that I use which is simple and slimline. I then attach an aftermarket adapter rack that best fits my top box - mine is a BMW 1200 Adventure adapter.

Alternatively have a look at the Toys-2-Go rack which is large but also adds 'side protection' (not my style but could work) and attach an adapter to that. In this case the rear rack is a similar design to the BMW one.

Hi Jayson - Goliath gives you some good info there - the T2G rack combo is lightweight, yet triangulated Off the foot-peg mounting brackets), so could offer support, since as you say, no rear sub-frame, just the tank-bolt set-up.

The older 690's benefit from having replacement tank bolts installed, unsure know of which year they were redesigned?

Whilst we MOSTLY sell Motorradical aluminium top boxes (5.7kg), for a host of reasons, we have sold TRAX s-p-e-c-i-f-i-c-a-l-l-y (5.1kg) to riders of lighter-weight thumpers, since the Trax has (had?) a much-thinner sidewall, which was a good thing in these cases: = less weight...

and we have put the EMGO Chinese plastic top box (2.0kg), also super light weight, on a good few bikes that are without substantial 'meat' in the tail; think X Challenge, etc.(they are crap to lean against and crap for offroad use, but perfect for a helmet whilst commuting, etc).

Flying Brick, agreed, plastic is kuk. So as its stands you do have a solution/adapter plate etc and aluminium top box?

The idea behind this would be to store items in the top box when the bike is not in use, ie helmet when arriving some where etc so i am not overly worried about the weight when in use as it will mostly be empty then.....

Hard Luggage one does not put onto bikes for offroad use - no exeptions!These filled boxes "hammer" on the bike, their inertia acting like a sledgehammer-blow, and for obvious reasons subframes break.The 690 does not even have a subframe!What acts as one is a plastic rotomould, the actual fuel tank, which is fragile at best, held by metal inserts gripping in, of course softish, plastic.In my opinion only fools will mount a hammering box on such, it will end in costly tears, possibly in a remote location too.

Soft luggage is exactly that, soft - a pliable outer with inside various goodies which, when the lot suddenly accelerates, put a gradual load on whatever supports them: because they deform, there are some friction-losses inside, and the impact will be less energy over a longer period!The 'gradual' is key here, contrary to aforementioned sledgehammer blow.

Toys2Go indeed has an awesome rack, not only because it supports off the passenger's footrests in a triangulating manner but also because it is quite well designed, strong enough too.Still, not suited for a hard case, but if you really have to prove me wrong then this rack will give you the best chance.I have one of them, on my 701, and no, I'll put a Giant Loop and Woema bag on... which will last I'm sure.

In any case it would be a good idea to buy the better-designed/stronger tank-mount bolts from Rally Raid, this will help even if you carry no luggage.Edited: my bike's new but I've ordered these things already, hence I practice quite like I preach